Merge branch 'Applications/18.12'

[dolphin.git] / src / views / draganddrophelper.h

diff --git a/src/views/draganddrophelper.h b/src/views/draganddrophelper.h
index b107efc1884cbbe37cd204a86b2f1f80123a1aa6..1a6b5900eb92b08f7c86650016d554778d2e7da4 100644 (file)
--- a/src/views/draganddrophelper.h
+++ b/src/views/draganddrophelper.h
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2007 by Peter Penz <peter.penz19@gmail.com>             *
+ *   Copyright (C) 2007-2011 by Peter Penz <peter.penz19@gmail.com>        *
  *   Copyright (C) 2007 by David Faure <faure@kde.org>                     *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
@@ -21,76 +21,49 @@
 #ifndef DRAGANDDROPHELPER_H
 #define DRAGANDDROPHELPER_H
 
-#include "libdolphin_export.h"
-#include <QObject>
-#include <QPixmap>
+#include "dolphin_export.h"
+
+#include <QList>
+#include <QUrl>
 
-class DolphinViewController;
-class KFileItem;
-class KUrl;
 class QDropEvent;
-class QAbstractItemView;
-class QMimeData;
 class QWidget;
+namespace KIO { class DropJob; }
 
-/**
- * @brief Helper class for having a common drag and drop behavior.
- *
- * The class is used by DolphinIconsView, DolphinDetailsView,
- * DolphinColumnView and PanelTreeView to have a consistent
- * drag and drop behavior between all views.
- */
-class LIBDOLPHINPRIVATE_EXPORT DragAndDropHelper : public QObject
+class DOLPHIN_EXPORT DragAndDropHelper
 {
-    Q_OBJECT
-
 public:
-    static DragAndDropHelper& instance();
-
     /**
-     * Creates a drag object for the view \a itemView for all selected items.
+     * Handles the dropping of URLs to the given destination. A context menu
+     * with the options 'Move Here', 'Copy Here', 'Link Here' and 'Cancel' is
+     * offered to the user. The drag destination must represent a directory or
+     * a desktop-file, otherwise the dropping gets ignored.
+     *
+     * @param destUrl   URL of the item destination. Is used only if destItem::isNull()
+     *                  is true.
+     * @param event     Drop event.
+     * @param window    Widget where the drop happened, will be used as parent of the drop menu.
+     * @return          KIO::DropJob pointer or null in case the destUrl is contained
+     *                  in the mimeData url list.
      */
-    void startDrag(QAbstractItemView* itemView,
-                   Qt::DropActions supportedActions,
-                   DolphinViewController* dolphinViewController = 0);
+    static KIO::DropJob* dropUrls(const QUrl& destUrl,
+                                  QDropEvent* event,
+                                  QWidget *window);
 
     /**
-     * Returns true if and only if the view \a itemView was the last view to
-     * be passed to startDrag(...), and that drag is still in progress.
+     * @return True if destUrl is contained in the urls parameter.
      */
-    bool isDragSource(QAbstractItemView* itemView) const;
+    static bool urlListMatchesUrl(const QList<QUrl>& urls, const QUrl& destUrl);
 
     /**
-     * Handles the dropping of URLs to the given
-     * destination. A context menu with the options
-     * 'Move Here', 'Copy Here', 'Link Here' and
-     * 'Cancel' is offered to the user.
-     * @param destItem  Item of the destination (can be null, see KFileItem::isNull()).
-     * @param destPath  Path of the destination.
-     * @param event     Drop event.
-     * @param widget    Source widget where the dragging has been started.
+     * clear the internal cache.
      */
-    void dropUrls(const KFileItem& destItem,
-                  const KUrl& destPath,
-                  QDropEvent* event,
-                  QWidget* widget);
-signals:
-    void errorMessage(const QString& msg);
-
+    static void clearUrlListMatchesUrlCache();
 private:
-    DragAndDropHelper();
-
     /**
-     * Creates a pixmap the contains the all icons of the items
-     * that are dragged.
+     * Stores the results of the expensive checks made in urlListMatchesUrl.
      */
-    QPixmap createDragPixmap(QAbstractItemView* itemView) const;
-
-    // The last view passed in startDrag(...), or 0 if
-    // no startDrag(...) initiated drag is in progress.
-    QAbstractItemView *m_dragSource;
-
-    friend class DragAndDropHelperSingleton;
+    static QHash<QUrl, bool> m_urlListMatchesUrlCache;
 };
 
 #endif